Her first Grand Slam tournament back was the French Open, where she won three matches before withdrawing last month because of an injured chest muscle. But when she's bad, she can be horrid. She was spraying balls.
But against Williams, who hit the fewest unforced errors among the four remaining players before the semifinals, she had a mountain to climb. Williams won that for a second consecutive Wimbledon title, then sat out the grass-court tournament a year ago while pregnant, part of a 16-month gap between majors.
Two months away from turning 37, and just 10 months after giving birth to her first child, this extraordinary athlete now has the opportunity to relive the 2016 Wimbledon final, when she played and defeated Kerber.
In the second set, the left-handed Kerber quickly went into the lead with Ostapenko choosing to live as dangerously as before.
Kerber let 2017 French Open champion Ostapenko determine the outcome of almost every point.
Serena Williams celebrates after winning against Italy's Camila Giorgi during their women's singles quarter-final match on the eighth day of the 2018 Wimbledon Championships at The All England Lawn Tennis Club in Wimbledon, London, July 10, 2018.
Williams' movement is far from the best on tour but her game is so well oiled that it does not matter, her ability to control proceedings ensuring she was always perfectly placed to unleash another groundstroke.
The 13th seed looked out of the contest at 5-3 down but she managed to force a gutsy break of serve with Williams serving for the match. That first game consisted of eight points: Three were unforced errors by Ostapenko, including a double-fault to begin the proceedings; the other five were winners by her, including a 100 miles per hour ace to close the hold.
Three hundred and fourteen days after becoming a mother, tennis champion Serena Williams earned her spot in the finals at Wimbledon.
Two former World No. 1-ranked players swept their way into the Wimbledon women's singles final by making quick work of their opponents in two brutally short sets.
Kerber, in contrast, bides her time, working the back of the court to get everything back over the net, often kneeling to get low enough to reach shots. That first game consisted of eight points: Three were unforced errors by Ostapenko, including a double-fault to begin the proceedings; the other five were winners by her, including a 100 miles per hour ace to close the hold.
The Detroit Lions and the Three Lions: Drawing inspiration
However - we think Martinez will rotate a few players, with the likes of Yannick Carrasco and Dedryck Boyata likely to come in. Meanwhile, Three Lions is set to score a UK No.1 this week, 22 years on from when it was originally released.